8486521865 has 32 divisors (see below), whose sum is σ = 10781268480. Its totient is φ = 6402452224.

The previous prime is 8486521861. The next prime is 8486521871. The reversal of 8486521865 is 5681256848.

It is a cyclic number.

It is not a de Polignac number, because 8486521865 - 2² = 8486521861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8486521861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4449242 + ... + 4451148.

It is an arithmetic number, because the mean of its divisors is an integer number (336914640).

Almost surely, 2^8486521865 is an apocalyptic number.

It is an amenable number.

8486521865 is a deficient number, since it is larger than the sum of its proper divisors (2294746615).

8486521865 is a wasteful number, since it uses less digits than its factorization.

8486521865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641.

The product of its digits is 3686400, while the sum is 53.

The square root of 8486521865 is about 92122.3201238440. The cubic root of 8486521865 is about 2039.7482921050.

The spelling of 8486521865 in words is "eight billion, four hundred eighty-six million, five hundred twenty-one thousand, eight hundred sixty-five".